[Age-related changes in lungs' vital capacity in Ryazan schoolchildren].

The vital capacity in the 11- and 14-year old boys and 11- and 13-year old girls examined in 1996 to 1999 significantly reduced as compared in the children of the same age. The significant increase in the vital capacity in 15-16-old girls examined in 1996-1999 is due to that in their height, as compared with these indices in those examined in 1976 (by 4.64 and 4.